I know a little bit about Linux. Maybe I can already connect to the Internet with my modem.
Now I have ISDN - and I can't get anywhere at all. Why?
Forget everything that you know about modems.
ISDN is completely different.
The concepts are different:
Under ISDN4Linux, the ISDN card is treated as a network card, only with special characteristics.
isdnlog listens in the background to the S0 bus and logs incoming and outgoing connections for later analysis (including cost control) and diagnosis.
Sets important parameters specific to I4L (e.g. telephone numbers).
The driver (as module or compiled into the kernel) for almost all passive ISDN cards.
Controls the HiSax driver.
The PPP daemon for ISDN (syncPPP).
ISDN activity is logged in /var/log/messages
(or via Syslog) -
important for diagnosing problems!
Using the terminal devices /dev/ttyI0
to
/dev/ttyI64
normal terminal programs can access ISDN -
but not analog access!
The ISDN answering machine.